Sergei Kardakov's professional portfolio starts with a cosmic hamster, a broad-shouldered bather with a water pistol and "Lyova Trakhtenburg," a lion in studio headphones resembling the late radio host and actor Roman Trakhtenberg. Further along comes "Richie the Rich Rat," the X-Men-inspired "Bullverine" and a pill-popping, devil-horned, one-eyed purple brain.